Dynamic temperature measuring device for molten aluminum

Abstract

The utility model discloses a kind of molten aluminum dynamic temperature measuring devices, belong to metal liquid temperature measuring technical field.Device adopts door shape support and is rigidly connected with molten aluminum launder by bolt, support both sides sliding block slidingly connected moving plate, top is equipped with lifting assembly, moving plate is lifted by lifting assembly driving, rotating assembly on moving plate is constituted by second motor, second speed reduction gear set and rotating rod, realize double wireless thermocouple switching.Moving plate is opened maintenance groove, cooperate buckle assembly to realize thermocouple quick assembly and disassembly, wireless thermocouple passes through built-in module transmission data, can be inserted depth according to liquid level dynamic adjustment with lifting assembly.Device integrates high-temperature liquid level sensor synchronous monitoring liquid level, bottom drip tank collects residual molten aluminum.The design solves the defect that traditional device is replaced complex, temperature measuring position is fixed, improves the precision, continuity and maintenance safety of molten aluminum dynamic temperature measuring, applicable to aluminum smelting, casting and other continuous production scene.

Description

Technical Field

[0001] This utility model relates to the field of metal liquid temperature measurement technology, and in particular to a dynamic temperature measurement device for aluminum liquid. Background Technology

[0002] In the aluminum alloy production industry, accurate monitoring of molten aluminum temperature is a core element in ensuring product quality and production efficiency. With the increasing demands for aluminum alloy material performance in high-end manufacturing sectors such as aerospace and new energy vehicles, the precision of molten aluminum temperature control directly affects the microstructure, mechanical properties, and defect rate of castings. For example, temperature fluctuations exceeding 5°C can lead to quality problems such as porosity and cracks. Currently, the aluminum industry is accelerating its transformation towards intelligent manufacturing, and the market demand for portable and intelligent temperature measurement equipment continues to grow. Real-time dynamic temperature measurement has become a key technological support for optimizing process parameters and reducing energy consumption.

[0003] In existing aluminum molten temperature measuring devices, the replacement process for thermocouples is quite cumbersome. Most of them are fixed installations. When thermocouples need to be replaced due to wear and tear from prolonged exposure to high temperatures, it is usually necessary to shut down the machine and disassemble multiple fixed connecting parts. The operation steps are complicated and time-consuming, which seriously affects the continuity of production, causes production losses, and also poses safety hazards for manual operation under high-temperature conditions. On the other hand, the liquid level in the aluminum molten flow channel changes dynamically with production processes such as material replenishment and casting. However, the thermocouples in traditional devices are fixed in position and cannot automatically adjust the insertion depth and temperature measurement position according to the aluminum molten liquid level. This makes it easy for the temperature measurement point to deviate from the effective monitoring area of ​​the aluminum molten liquid, resulting in distorted temperature monitoring data. It is difficult to meet the needs of dynamic and accurate monitoring of aluminum molten temperature in continuous production processes. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a dynamic temperature measuring device for molten aluminum, which aims to improve the problems of existing molten aluminum temperature measuring devices being unable to quickly replace thermocouples and unable to adjust the thermocouple insertion depth.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a dynamic temperature measuring device for molten aluminum, comprising a molten aluminum flow channel and a support. The support is U-shaped, and the right side of the support is fixedly connected to the side wall of the molten aluminum flow channel by bolts. Slider blocks are fixedly connected to the inner walls of both sides of the support, and the sliders on both sides are slidably connected to a moving plate. A rotating assembly is provided on the moving plate, and a wireless thermocouple is detachably connected to the rotating assembly. A lifting assembly for driving the moving plate, the rotating assembly, and the wireless thermocouple to move up and down is provided on the top of the support. The rotating assembly includes a second motor, a second reduction gear set, and a rotating rod. The second motor is located on the top of the moving plate, and the output shaft of the second motor is fixedly connected to the second reduction gear set. The output shaft of the second reduction gear set rotates through the moving plate. The rotating rod is fixedly connected to the output shaft of the second reduction gear set, and the two wireless thermocouples are detachably connected to both ends of the rotating rod.

[0006] As a further description of the above technical solution:

[0007] The lifting assembly includes a first motor, a first reduction gear set, and a ball screw. The first motor is mounted on the top of the bracket, and the output shaft of the first motor is fixedly connected to the first reduction gear set. The output shaft of the first reduction gear set rotates through the bracket. The ball screw is fixedly connected to the output shaft of the first reduction gear set, and the ball nut of the ball screw is fixedly connected to the moving plate to drive the moving plate to perform lifting and lowering movements.

[0008] As a further description of the above technical solution:

[0009] The mobile plate has a maintenance slot for quick replacement of wireless thermocouples, providing operating space for replacing wireless thermocouples without disassembling the mobile plate or rotating the entire assembly, further simplifying the replacement process, reducing maintenance time, and ensuring production continuity.

[0010] As a further description of the above technical solution:

[0011] The wireless thermocouple is quickly attached and detached from the rotating rod via a snap-fit ​​assembly, eliminating the need for complex tools and reducing the difficulty and safety hazards of manual operation under high-temperature conditions.

[0012] As a further description of the above technical solution:

[0013] The wireless thermocouple is covered with a protective cover, which can isolate it from direct scouring and high-temperature corrosion by molten aluminum, prevent damage to the thermocouple probe, extend its service life, and reduce the impact of molten aluminum adhesion on temperature measurement accuracy.

[0014] As a further description of the above technical solution:

[0015] A mounting plate is fixed to the inner wall on the right side of the bracket. A high-temperature liquid level sensor for measuring the liquid level of aluminum liquid is fixedly installed at the bottom of the mounting plate. This provides data for adjusting the thermocouple insertion depth of the lifting assembly, ensuring that the temperature measuring point is always in the effective area of ​​the aluminum liquid and avoiding temperature measurement distortion caused by changes in liquid level.

[0016] As a further description of the above technical solution:

[0017] The bracket is fixedly installed below the wireless thermocouple on the outside of the aluminum liquid flow channel. This prevents the aluminum liquid from dripping and corroding the bracket, motor, and other components, or causing safety risks, and reduces equipment maintenance costs.

[0018] As a further description of the above technical solution:

[0019] The top of the bracket has a clearance hole to prevent the second motor from interfering with the bracket, ensuring the normal operation of the motor and the rotation stroke of the rotating component, ensuring smooth switching of the dual thermocouples, and improving the rationality of the device structure.

[0020] As a further description of the above technical solution:

[0021] Both the first motor and the second motor are electrically connected to an external controller via high-temperature resistant wires, and the wireless thermocouple has a built-in wireless communication module that is wirelessly connected to the external controller.

[0022] As a further description of the above technical solution:

[0023] The first motor, the second motor, and the wires are all covered with high-temperature resistant ceramic sheaths to isolate them from external high-temperature radiation and aluminum molten splashes, extend the service life of the motors and wires, and ensure the long-term reliability of the device under high-temperature conditions.

[0024] This utility model has the following beneficial effects:

[0025] 1. This utility model, through the dual wireless thermocouple design of the rotating component, enables rapid replacement of wireless thermocouples. Simultaneously, the maintenance slot on the moving plate, in conjunction with the snap-fit ​​component, allows for quick installation and removal of the thermocouples without requiring machine shutdown to disassemble complex fixing structures. This significantly simplifies the thermocouple replacement process, saves maintenance time, ensures production continuity, and reduces the safety hazards of manual operation under high-temperature conditions. Furthermore, by utilizing the lifting component to drive the moving plate up and down along the slider, combined with the switching control of the dual wireless thermocouples by the rotating component, the insertion depth and temperature measurement position of the thermocouples can be dynamically adjusted according to the liquid level in the aluminum molten flow channel. This ensures that the temperature measurement point is always within the effective monitoring area of ​​the aluminum molten material, avoiding temperature data distortion caused by liquid level changes and meeting the need for dynamic and accurate monitoring of aluminum molten temperature in continuous production.

[0026] 2. The protective cover on the outer layer of the wireless thermocouple can isolate it from direct scouring by molten aluminum, further improving the thermocouple's high-temperature resistance and corrosion resistance; the high-temperature liquid level sensor at the bottom of the mounting plate can simultaneously measure the molten aluminum level, forming a linkage analysis with temperature data, providing a more comprehensive basis for process optimization; the drip tray can collect the molten aluminum residue when the thermocouple is raised, avoiding molten aluminum dripping that could cause equipment corrosion or safety risks; the portal-shaped bracket is rigidly connected to the side wall of the flow channel by bolts, and with the transmission of the slider and ball screw, the structure is highly stable, reducing temperature measurement errors. Attached Figure Description

[0027] Figure 1 This is a front perspective view of the dynamic temperature measuring device for molten aluminum proposed in this utility model;

[0028] Figure 2 This is a three-dimensional view of the back of the aluminum liquid dynamic temperature measuring device proposed in this utility model;

[0029] Figure 3 This is a perspective view of the lifting assembly of the dynamic temperature measuring device for molten aluminum proposed in this utility model when it is raised.

[0030] Figure 4 This is a schematic diagram of the wireless thermocouple installation structure of the dynamic temperature measurement device for molten aluminum proposed in this utility model.

[0031] Legend:

[0032] 1. Aluminum liquid flow channel; 2. Support; 2-1. Slider; 2-2. Clearance hole; 3. Moving plate; 3-1. Inspection slot; 4. First motor; 5. First reduction gear set; 6. Ball screw; 7. Second motor; 8. Second reduction gear set; 9. Rotating rod; 10. Wireless thermocouple; 10-1. Protective cover; 11. Mounting plate; 12. High temperature liquid level sensor; 13. Drip tank. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] Reference Figure 1-4This utility model provides an embodiment of a dynamic temperature measuring device for molten aluminum, comprising a molten aluminum flow channel 1 and a support 2. The support 2 is U-shaped, and the right side of the support 2 is fixedly connected to the side wall of the molten aluminum flow channel 1 by bolts. Slider 2-1 is fixedly connected to the inner walls of both sides of the support 2. The two sliders 2-1 are slidably connected to a moving plate 3. A rotating component is provided on the moving plate 3, and a wireless thermocouple 10 is detachably connected to the rotating component. A lifting component is provided at the top of the support 2 for driving the moving plate 3, the rotating component, and the wireless thermocouple 10 to move up and down. The rotating component includes a second motor 7, a second reduction gear set 8, and a rotating rod 9. The second motor 7 is located at the top of the moving plate 3, and the output shaft of the second motor 7 is fixedly connected to the second reduction gear set 8. The output shaft of the second reduction gear set 8 rotates through the moving plate 3. The rotating rod 9 is fixedly connected to the output shaft of the second reduction gear set 8, and two wireless thermocouples 10 are detachably connected to both ends of the rotating rod 9. The lifting assembly includes a first motor 4, a first reduction gear set 5, and a ball screw 6. The first motor 4 is mounted on the top of the bracket 2. The output shaft of the first motor 4 is fixedly connected to the first reduction gear set 5. The output shaft of the first reduction gear set 5 rotates through the bracket 2. The ball screw 6 is fixedly connected to the output shaft of the first reduction gear set 5. The ball nut of the ball screw 6 is fixedly connected to the moving plate 3 to drive the moving plate 3 to perform lifting and lowering movements.

[0035] The movable plate 3 has a maintenance slot 3-1 for quick replacement of the wireless thermocouple 10. The wireless thermocouple 10 is quickly attached and detached from the rotating rod 9 via a snap-fit ​​assembly. A protective cover 10-1 is fitted over the wireless thermocouple 10. A mounting plate 11 is fixed to the inner right side wall of the bracket 2. A high-temperature liquid level sensor 12 for measuring the aluminum liquid level is fixedly installed at the bottom of the mounting plate 11. A drip tray 13 is fixedly installed on the bracket 2 below the wireless thermocouple 10 outside the aluminum liquid flow channel 1. A clearance hole 2-2 is provided at the top of the bracket 2 to allow the second motor 7 to pass through. Both the first motor 4 and the second motor 7 are electrically connected to an external controller via high-temperature resistant wires. The wireless communication module built into the wireless thermocouple 10 is wirelessly connected to the external controller. All motors are high-temperature resistant servo motors. The bracket 2 and all components are made of high-temperature resistant materials. The motors, lead screws, and wires near the aluminum liquid flow channel are all covered with high-temperature resistant ceramic sleeves.

[0036] The specific implementation method is as follows: Before the aluminum liquid dynamic temperature measurement device is started, the moving plate 3 is in a high position driven by the lifting component, the wireless thermocouple 10 is away from the aluminum liquid in the aluminum liquid flow channel 1, the rotating rod 9 is in a horizontal initial state, the first motor 4 and the second motor 7 are connected to the external controller through high temperature resistant wires, the wireless thermocouple 10 establishes a data transmission channel with the controller through the built-in wireless communication module, the high temperature liquid level sensor 12 on the mounting plate 11 has started to monitor the aluminum liquid level in real time and transmit data, the controller pre-stores the normal working threshold of the wireless thermocouple 10, including the signal transmission interval, the temperature data fluctuation range, and the minimum temperature measurement liquid level threshold of the aluminum liquid, such as 50mm above the bottom of the flow channel; when started, the controller first receives the liquid level data of the high temperature liquid level sensor 12. If the liquid level is not lower than the minimum temperature measurement threshold, it is determined that "aluminum liquid is present" and the temperature measurement process is allowed to start; if the liquid level is lower than the minimum temperature measurement threshold, it is determined that "no aluminum liquid is present", the controller sends a standby signal, the wireless thermocouple 10 remains in a high position and does not move, and does not perform temperature monitoring and fault judgment, so as to avoid misjudgment in the no-test state.

[0037] Once the presence of molten aluminum is detected, the external controller issues a temperature measurement command, the lifting assembly starts, the first motor 4 operates, and the power is transmitted to the ball screw 6 via the first reduction gear set 5. The ball screw 6's ball nut drives the moving plate 3 to descend vertically along the sliders 2-1 on both sides of the bracket 2, causing the wireless thermocouple 10 at one end of the rotating rod 9 to be inserted into the molten aluminum. The wireless thermocouple 10 is isolated from direct molten aluminum flow by the outer protective cover 10-1, senses the temperature, and transmits the signal to the controller via the wireless module. The controller displays the temperature in real time and continuously monitors the status of the thermocouple, transmitting the status data back to the controller every 10 seconds. The status data includes comparison with the backup thermocouple data and signal transmission. If three consecutive data are not received or the deviation from the backup thermocouple data exceeds the threshold, and the liquid level is still not lower than the minimum threshold, the abnormality caused by the absence of molten aluminum can be ruled out, and it is immediately determined that replacement is necessary.

[0038] After determining that replacement is needed, the controller first activates the lifting assembly to raise the moving plate 3, causing the main thermocouple to detach from the molten aluminum and return to the high-level safety zone. Then, the second motor 7 operates, and the power is transmitted through the second reduction gear set 8 to rotate the rotating rod 9 180°, turning the other end of the spare wireless thermocouple 10 directly below the original temperature measurement position. The lifting assembly then drives the moving plate 3 to descend again, allowing the spare thermocouple to be inserted into the molten aluminum. The spare thermocouple automatically takes over the data transmission, ensuring uninterrupted data transmission. If the problem persists after the spare thermocouple is connected, and the liquid level is normal, the controller determines that there is a "dual thermocouple failure," issues an alarm, and suspends temperature measurement, awaiting manual intervention.

[0039] If a faulty thermocouple needs to be replaced on-site, the moving plate 3 is raised to its highest position, and the rotating rod 9 is turned to a horizontal position. The thermocouple to be replaced is aligned with the inspection slot 3-1 of the moving plate 3. After the old thermocouple has cooled down, the operator can quickly install and remove it using the snap-fit ​​assembly. After the new thermocouple is installed, the controller automatically compares its real-time data with the currently working standby thermocouple. After confirming a match, the new thermocouple is set as a standby component, and the original standby component becomes the primary component, completing the redundancy recovery. During temperature measurement, the high-temperature liquid level sensor 12 continuously monitors the liquid level. If the liquid level suddenly drops below the minimum threshold, the controller immediately activates the lifting assembly to raise the thermocouple to a high position, suspends temperature measurement, and records the "insufficient liquid level" status. At this time, no fault judgment is performed to avoid misjudging the temperature abnormality when there is no aluminum liquid. After the liquid level rises back above the threshold, the controller automatically wakes up the temperature measurement process and starts the main thermocouple temperature measurement according to the original steps.

[0040] Meanwhile, the residual molten aluminum drips into the dripping tank 13 below when the thermocouple is raised, and the clearance hole 2-2 at the top of the bracket 2 prevents the second motor 7 from interfering with the bracket; the high-temperature liquid level sensor 12 provides real-time feedback on the liquid level height, and the controller adjusts the wireless thermocouple 10 to the corresponding liquid level for temperature measurement through the lifting component as needed. Throughout the process, the external controller integrates the liquid level, temperature data and the actions of each component, and achieves continuous and stable operation of dynamic temperature measurement of molten aluminum through liquid level pre-judgment, dynamic monitoring and abnormal protection, avoiding misjudgment and equipment damage in the absence of molten aluminum.

[0041] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A dynamic temperature measuring device for molten aluminum, comprising a molten aluminum flow channel (1) and a support (2), characterized in that: The bracket (2) is in the shape of a door. The right side of the bracket (2) is fixedly connected to the side wall of the aluminum liquid flow channel (1) by bolts. The inner walls of both sides of the bracket (2) are fixedly connected to sliders (2-1). The sliders (2-1) on both sides are slidably connected to a moving plate (3). A rotating component is provided on the moving plate (3). A wireless thermocouple (10) is detachably connected to the rotating component. A lifting component is provided on the top of the bracket (2) for driving the moving plate (3), the rotating component and the wireless thermocouple (10) to move up and down. The rotating assembly includes a second motor (7), a second reduction gear set (8), and a rotating rod (9). The second motor (7) is located on the top of the moving plate (3). The output shaft of the second motor (7) is fixedly connected to the second reduction gear set (8). The output shaft of the second reduction gear set (8) rotates through the moving plate (3). The rotating rod (9) is fixedly connected to the output shaft of the second reduction gear set (8). The two wireless thermocouples (10) are detachably connected to both ends of the rotating rod (9).

2. The dynamic temperature measuring device for molten aluminum according to claim 1, characterized in that: The lifting assembly includes a first motor (4), a first reduction gear set (5), and a ball screw (6). The first motor (4) is mounted on the top of the bracket (2). The output shaft of the first motor (4) is fixedly connected to the first reduction gear set (5). The output shaft of the first reduction gear set (5) rotates through the bracket (2). The ball screw (6) is fixedly connected to the output shaft of the first reduction gear set (5). The ball nut of the ball screw (6) is fixedly connected to the moving plate (3) to drive the moving plate (3) to perform lifting and lowering movements.

3. The dynamic temperature measuring device for molten aluminum according to claim 1, characterized in that: The movable plate (3) is provided with a maintenance slot (3-1) for quick replacement of the wireless thermocouple (10).

4. The dynamic temperature measuring device for molten aluminum according to claim 3, characterized in that: The wireless thermocouple (10) is quickly attached to and detached from the rotating rod (9) via a snap-fit ​​assembly.

5. The dynamic temperature measuring device for molten aluminum according to claim 4, characterized in that: The wireless thermocouple (10) is covered with a protective cover (10-1).

6. The dynamic temperature measuring device for molten aluminum according to claim 1, characterized in that: A mounting plate (11) is fixedly connected to the inner wall of the right side of the bracket (2), and a high-temperature liquid level sensor (12) for measuring the liquid level of aluminum liquid is fixedly installed at the bottom of the mounting plate (11).

7. The dynamic temperature measuring device for molten aluminum according to claim 1, characterized in that: The bracket (2) is fixedly installed with a dripping tank (13) below the wireless thermocouple (10) on the outside of the aluminum liquid flow channel (1).

8. The dynamic temperature measuring device for molten aluminum according to claim 1, characterized in that: The top of the bracket (2) is provided with a clearance hole (2-2) to prevent the second motor (7) from interfering with the bracket.

9. The dynamic temperature measuring device for molten aluminum according to claim 2, characterized in that: The first motor (4) and the second motor (7) are electrically connected to the external controller via wires, and the wireless thermocouple (10) has a built-in wireless communication module that is wirelessly connected to the external controller.

10. The dynamic temperature measuring device for molten aluminum according to claim 9, characterized in that: The first motor (4), the second motor (7), and the conductor are all covered with high-temperature resistant ceramic sheaths.

Images